Extension of operating air-gap in electromagnetic levitation system by using intelligent controllers Online publication date: Mon, 01-Oct-2018
by Subrata Banerjee
International Journal of Automation and Control (IJAAC), Vol. 12, No. 4, 2018
Abstract: Electromagnetic levitation system (EMLS) is inherently unstable and strongly nonlinear in nature. The parameters of EMLS undergo considerable variation with change in air-gap. This makes the design and implementation of robust controllers difficult. This paper deals with intelligent controllers utilising gravitational search algorithm (GSA) based piecewise linear control and GSA based fuzzy control scheme to extend the range of operating air-gap for an EMLS. Extensive simulation has been carried out for the tuning of controller parameters and it is found the GSA based technique produces improved performance. Robust design of controllers for different zones is confirmed by Kharitonov/Nyquist enclosure. The controllers are tested in a small-scale system in the laboratory confirming the usefulness of the proposed technique. Such systems are useful for magnetic levitation (maglev) based applications those need to operate in a large operating air-gap.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Automation and Control (IJAAC):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook